Merge pull request #3 from timlg07/praktomat-specific-version

Updated Tests.txt according to latest code changes.

Author: timlg07

Tests.txt

@@ -54,7 +54,17 @@ sudoku> print
  .  .  .  .  .  .  .  .  .  .  .  .
  .  .  .  .  .  .  .  .  .  . 10  5
 sudoku> input sudokus\impossible.sud
-Error! The file contains an invalid sudoku.
+sudoku> print
+. . . .
+1 . . .
+. 3 . .
+. 4 . .
+sudoku> saturate
+Error! This board is unsolvable
+sudoku> first
+Error! This board is unsolvable
+sudoku> all
+Error! This board is unsolvable
 sudoku> input sudokus\blank.sud
 sudoku> print
 . . . .